JPS62279532A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPS62279532A JPS62279532A JP61121114A JP12111486A JPS62279532A JP S62279532 A JPS62279532 A JP S62279532A JP 61121114 A JP61121114 A JP 61121114A JP 12111486 A JP12111486 A JP 12111486A JP S62279532 A JPS62279532 A JP S62279532A
- Authority
- JP
- Japan
- Prior art keywords
- film
- substrate
- recording
- protective film
- optical disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 32
- 230000001681 protective effect Effects 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 6
- 238000004544 sputter deposition Methods 0.000 claims description 3
- 238000007740 vapor deposition Methods 0.000 claims description 3
- 230000006866 deterioration Effects 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 5
- 238000010030 laminating Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001755 magnetron sputter deposition Methods 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/10—Hair or skin implants
Landscapes
- Health & Medical Sciences (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Dermatology (AREA)
- Cardiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔産業上の利用分野〕
本発明は光ディスクに係り、特に耐環境性に優れた光デ
ィスクに関する。Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an optical disc, and particularly to an optical disc with excellent environmental resistance.
光ディスク用記録膜として、ＴｂＦｅＣｏ膜等の光磁気
記録膜やＳｎＴθＳｃ膜等の相変化型記録膜などがある
。記録膜の片面あるいは両面には誘電体膜等の保護膜が
積層される。これは記録・再生時やディスクの保存時に
生じる記録膜の劣化を防ぐためである。代表的な誘電体
膜としては、５ｉＯｚ。As recording films for optical discs, there are magneto-optical recording films such as TbFeCo films and phase change type recording films such as SnTθSc films. A protective film such as a dielectric film is laminated on one or both sides of the recording film. This is to prevent deterioration of the recording film that occurs during recording/playback or storage of the disc. A typical dielectric film is 5iOz.
Ｓｌ−○、ＡＱＮ、ＴａＮ等がある。There are Sl-○, AQN, TaN, etc.
しかし、上記のような保護膜を積層した光ディスクにお
いても、ディスクの内周あるいは外周部分から記録膜が
劣化する例があった。これは、ディスク７の内周あるい
は外周の側面部分で記録膜が直接大気と接してしまうた
めである。However, even in optical discs in which the above-mentioned protective film is laminated, there have been cases in which the recording film deteriorates from the inner or outer periphery of the disc. This is because the recording film comes into direct contact with the atmosphere at the side surfaces of the inner or outer circumference of the disk 7.
従来、ディスク側面からの記録膜の劣化を防ぐ方法とし
て、例えば特開昭６０−１１５０３７号公報に示される
ように、ディスク側面に耐湿性封止部材を形成する方法
が知られている。Conventionally, as a method for preventing deterioration of a recording film from the side surface of a disk, a method of forming a moisture-resistant sealing member on the side surface of the disk is known, for example, as disclosed in Japanese Patent Laid-Open No. 115037/1983.
しかし耐湿性封止部材は、記録膜積層後に、塗布法ある
いは接着法で形成されるため、真空中で行うことができ
ず、記録膜と大気の遮断を完全に行うことができないと
いう欠点があった。またディスク作製の工程が複雑にな
るという問題があった。However, since the moisture-resistant sealing member is formed by a coating method or an adhesive method after the recording film is laminated, it cannot be formed in a vacuum and has the disadvantage that it cannot completely isolate the recording film from the atmosphere. Ta. There is also the problem that the disc manufacturing process becomes complicated.
本発明の目的は、上記問題点を解決するもので耐環境性
に優れ、長期保存に適した光ディスクを提供することに
ある。SUMMARY OF THE INVENTION An object of the present invention is to provide an optical disc that solves the above problems, has excellent environmental resistance, and is suitable for long-term storage.
〔問題点を解決するための手段〕
本発明は、ディスク基板と記録膜と保護膜より成る光デ
ィスクにおいて、ディスク基板の最外周または最内周の
少なくとも一方に段差または溝を設けるか、上層の保護
膜により記録膜の内周若しくは外周を覆うことにより構
成される。[Means for Solving the Problems] The present invention provides an optical disc comprising a disc substrate, a recording film, and a protective film, by providing a step or a groove on at least one of the outermost or innermost periphery of the disc substrate, or by providing a protective layer on the upper layer. It is constructed by covering the inner or outer periphery of the recording film with a film.
段差または溝を設けたディスク基板上に記録膜と保護膜
を順次積層することによって、記録膜はディスクの側面
部分においても大気と完全に遮断される。また、上層の
保護膜形成時に記録膜の側部を覆うようにすれば容易に
光ディスクの記録膜が大気から遮断される。By sequentially laminating a recording film and a protective film on a disc substrate provided with steps or grooves, the recording film is completely isolated from the atmosphere even on the side surfaces of the disc. Further, if the side portions of the recording film are covered when forming the upper protective film, the recording film of the optical disc can be easily shielded from the atmosphere.
以下１本発明の実施例について詳述する。 One embodiment of the present invention will be described in detail below.
［実施例１コ
最外周および最内周に高さ３０００人１幅１μｍの段差
を設けたプラスチック基板１上に、蒸着法によりＳｉＯ
膜（誘電体保護膜２）を８００人積層し、続いてＴｂＦ
ｅＣｏ膜（記録膜３）をｔｏｏｏ入形成した。さらに、
真空を破ることなく、１２００人のＳｊＯ膜を蒸着法に
より形成した。第１図にこの光ディスクの一部分の断面
図を示す。プラスチック基板としては射゛出成形法によ
り作製したポリカーボネート基板、エポキシ基板とＰＭ
ＭＡ基板の３種類の基板を使用した。それぞれの基板を
用いて作製した光ディスクは、記録膜の劣化を調べるた
めに、８０＠の大気中に８０日間保持し、保磁力の変化
を調べた。いずれの基板を用いた場合も保磁力の変化は
±８％以内であり、記録膜の劣化は生じなかった。[Example 1] SiO was deposited by vapor deposition on a plastic substrate 1 with steps of 3,000 people in height and 1 μm in width on the outermost and innermost peripheries.
800 films (dielectric protective film 2) were laminated, followed by TbF
An eCo film (recording film 3) was formed to a certain extent. moreover,
1200 SjO films were formed by vapor deposition without breaking the vacuum. FIG. 1 shows a cross-sectional view of a portion of this optical disc. Plastic substrates include polycarbonate substrates made by injection molding, epoxy substrates, and PM.
Three types of MA substrates were used. In order to examine the deterioration of the recording film, the optical discs produced using each substrate were kept in an atmosphere of 80°C for 80 days, and changes in coercive force were examined. No matter which substrate was used, the change in coercive force was within ±8%, and no deterioration of the recording film occurred.
［実施例２］
最外周および最内周に深さ３５００人２幅０．５μｍの
溝を設けたディスク基板１上に、マグネトロンスパッタ
法によりＡｕＮ膜（誘電体保護膜２）を８００人積層し
、続いてＴｂＦｅＣｏ膜（記＃ｌ膜３）を１０００人積
層した。さらに、ＴｂＦｅＣｏ膜上に１７００人のＡＱ
Ｎ膜を積層した。第２図にこの光ディスクの一部分の断
面図を示す。ディスク基板には、ＰＭＭＡ基板とガラス
基板を使用した。実施例１と同様に、作製した光ディス
クは、８０℃の大気中に８０日間保持し、保磁力の変化
を調べた。保磁力の変化はいずれの基板の場合も±８％
以内であり。[Example 2] 800 people deposited an AuN film (dielectric protective film 2) by magnetron sputtering on a disk substrate 1 with grooves of 3,500 people deep and 0.5 μm wide on the outermost and innermost peripheries. Then, 1000 TbFeCo films (#1 film 3) were laminated. In addition, 1700 AQ on TbFeCo film
A N film was laminated. FIG. 2 shows a cross-sectional view of a portion of this optical disc. A PMMA substrate and a glass substrate were used for the disk substrate. In the same manner as in Example 1, the manufactured optical disk was kept in the atmosphere at 80° C. for 80 days, and changes in coercive force were examined. Coercive force change is ±8% for all substrates.
within.
記録膜の劣化は生じなかった。No deterioration of the recording film occurred.
以上のように１本実施例によれば、光ディスクの記録膜
の耐環境性を向上させる効果がある。As described above, this embodiment has the effect of improving the environmental resistance of the recording film of an optical disc.
［実施例３］
第３図はガラス基板３１を用いた本発明になる光磁気記
録媒体である。まずフォトポリマー法を用い、ガラス基
板３１の最内周と最外周の一部を除いて紫外線硬化樹脂
層３２を設けた。この紫外線硬化樹脂層３２には、光ス
ボツ１−の案内用に、ピッチ１．６μｍ、深さ７００人
の案内溝を形成しである１次に紫外線硬化樹脂ｙＰＪ３
２を全て覆うように、ＳｉＯ保護膜３３をマグネトロン
スパッタにより約８００人の厚さ形成した。更にこの保
護膜３３の上に、ＴｂｚａＦｅｓｚＣｏｔｏ非晶質磁性
膜３４を同じマグネトロンスパッタを用い、マスクスパ
ッタ法で約１０００人の厚さ作製した。即ち、基板３１
の最内周と最外周の一部に非晶質磁性膜３４が付着しな
いように、２つのステンレス製円環状マスクを保護膜３
３上に設置し又スパッタを行った。最後に、ＡＱＮ保護
膜３５をマグネトロンスバッタにより１５００人積層し
た。このとき、第３１％に示したように、ＡＱＮ保護膜
３５は、ＴｂｚａＦｅｅｚＣｏｘｏ非晶質磁性膜３４を
大気から完全に遮断するように積層されていることにな
る。紫外線硬化樹脂層３２も大気から完全に遮断されて
いるため、これが大気中の水分あるいは酸素を吸収し、
これがＳｉ○保護膜３３のピンホールを通って非晶質膜
３４を酸化するということも防ぐことができる。また、
非晶質磁性膜３４や紫外線硬化樹脂層３２を大気から遮
断する物質が誘電体Ａｌ２Ｎ３５であるため、非晶質膜
３４の記録感度を低下させることはない。尚、上述の実
施例において磁性膜は非晶質膜に限られるものではな（
、ＭｎＢ１等の多結晶膜、磁性ガーネット等の単結晶膜
でもよい。更に、誘導体保護膜としては、ＡＱＮ、ＳＬ
Ｏ以外に、Ｓ ｉｏｚ、 ＺｎＳ、 ５Ｌ３Ｎ４． Ａ
ＱｚＱａ、 ＴａＮ＋ＮｂＮ等を用いてもよい。このと
きの膜厚は５００〜３０００人の範囲が適当である。基
板においても、ガラス、ポリカーボネート以外に、エポ
キシ。[Example 3] FIG. 3 shows a magneto-optical recording medium according to the present invention using a glass substrate 31. First, using a photopolymer method, an ultraviolet curable resin layer 32 was provided on the glass substrate 31 except for part of the innermost and outermost peripheries. In this ultraviolet curing resin layer 32, guide grooves with a pitch of 1.6 μm and a depth of 700 mm are formed for guiding the optical slot 1-.
A SiO protective film 33 was formed to a thickness of about 800 mm by magnetron sputtering so as to cover the entire surface of the substrate. Further, on this protective film 33, a TbzaFeszCoto amorphous magnetic film 34 was formed to a thickness of about 1000 by mask sputtering using the same magnetron sputtering method. That is, the substrate 31
To prevent the amorphous magnetic film 34 from adhering to the innermost and outermost parts of the protective film 3
3, and sputtering was performed again. Finally, 1,500 AQN protective films 35 were deposited using a magnetron scatterer. At this time, as shown at 31%, the AQN protective film 35 is laminated so as to completely shield the TbzaFeezCoxo amorphous magnetic film 34 from the atmosphere. Since the ultraviolet curing resin layer 32 is also completely shielded from the atmosphere, it absorbs moisture or oxygen in the atmosphere.
It is also possible to prevent this from passing through pinholes in the Si◯ protective film 33 and oxidizing the amorphous film 34. Also,
Since the material that shields the amorphous magnetic film 34 and the ultraviolet curing resin layer 32 from the atmosphere is the dielectric Al2N35, the recording sensitivity of the amorphous film 34 is not reduced. Note that in the above embodiments, the magnetic film is not limited to an amorphous film (
, a polycrystalline film such as MnB1, or a single crystalline film such as magnetic garnet. Furthermore, as the derivative protective film, AQN, SL
In addition to O, Sioz, ZnS, 5L3N4. A
QzQa, TaN+NbN, etc. may also be used. The appropriate film thickness at this time is in the range of 500 to 3000 people. In addition to glass and polycarbonate, we also use epoxy for substrates.
ＰＭＭＡ、などが使用可能である。PMMA, etc. can be used.
第３図に示す光磁気記録媒体（ａ）と、膜構成は同じで
磁性膜３４の側面を露出させた点だけが異なる光磁気記
録媒体（ｂ）とを用い、８０”Ｃ。The magneto-optical recording medium (a) shown in FIG. 3 and the magneto-optical recording medium (b) which have the same film structure but differ only in that the side surface of the magnetic film 34 is exposed are used at 80''C.
９５％相対湿度の環境試験を行い、基板外周部での反射
率（初期値で規格化しである）の経時変化を基板側から
測定したところ、第４図に示すように、本発明になる光
磁気記録媒体では良好な保護効果を示すことがわかる。An environmental test was conducted at 95% relative humidity, and the change in reflectance (normalized to the initial value) at the outer periphery of the substrate was measured from the substrate side. As shown in Figure 4, the light according to the present invention It can be seen that magnetic recording media exhibit a good protective effect.
本発明によれば、光ディスクの記録膜がディスクの側面
部分から劣化を生じるのを防ぎ、光ディスクの耐環境性
を向上させることが可能となる。According to the present invention, it is possible to prevent the recording film of an optical disc from deteriorating from the side surfaces of the disc, and to improve the environmental resistance of the optical disc.
第１図および第２図は本発明による光ディスクの一実施
例の一部を示す断面図、ｆ５３図は本発明による光磁気
ディスクの断面図、第４図は本発明の効果を示す図であ
る。
１・・・ディスク基板、２・・・誘電体保護膜、３・・
・記録膜３ 口
第４ 図
碕閏（ｈとガ）FIGS. 1 and 2 are cross-sectional views showing a part of an embodiment of the optical disk according to the present invention, FIG. f53 is a cross-sectional view of the magneto-optical disk according to the present invention, and FIG. . 1... Disk substrate, 2... Dielectric protective film, 3...
・Recording film 3 Mouth 4 Figure 3 (h and g)
Claims (1)
該記録膜上に形成された保護膜を有する光ディスクにお
いて、記録膜の内周若しくは外周の少なくとも一方を、
前記基板の構成部材若しくは前記保護膜の構成部材で覆
うことを特徴とする光ディスク。 ２、特許請求の範囲第１項記載において、ディスク基板
の最外周または最内周の少なくとも一方に段差または溝
を設けたことを特徴とする光ディスク。 ３、特許請求の範囲第２項記載において、前記光ディス
ク基板の段差または溝の部分で、記録膜を大気から遮断
したことを特徴とする光ディスク。 ４、特許請求の範囲第２項または第３項記載において、
前記記録膜と保護膜の少なくとも一方を蒸着法あるいは
スパッタ法で作製したことを特徴とする光ディスク。 ５、特許請求の範囲第２項または第３項記載において、
前記光ディスク基板の段差または溝の高さが１０００Å
以上であることを特徴とする光ディスク。[Claims] 1. A disk substrate, a recording film formed on the substrate,
In an optical disc having a protective film formed on the recording film, at least one of the inner periphery or the outer periphery of the recording film is
An optical disc characterized in that it is covered with a component of the substrate or a component of the protective film. 2. An optical disc according to claim 1, characterized in that a step or a groove is provided on at least one of the outermost circumference and the innermost circumference of the disk substrate. 3. The optical disc according to claim 2, wherein the recording film is shielded from the atmosphere by a step or groove portion of the optical disc substrate. 4. In claim 2 or 3,
An optical disc characterized in that at least one of the recording film and the protective film is produced by a vapor deposition method or a sputtering method. 5. In claim 2 or 3,
The height of the step or groove of the optical disc substrate is 1000 Å.
An optical disc characterized by the above.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61121114A JPS62279532A (en) | 1986-05-28 | 1986-05-28 | Optical disk |
| US07/049,582 US4751927A (en) | 1986-05-28 | 1987-05-13 | Hair implantation method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61121114A JPS62279532A (en) | 1986-05-28 | 1986-05-28 | Optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62279532A true JPS62279532A (en) | 1987-12-04 |
Family
ID=14803229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61121114A Pending JPS62279532A (en) | 1986-05-28 | 1986-05-28 | Optical disk |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4751927A (en) |
| JP (1) | JPS62279532A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113452A (en) * | 1988-10-21 | 1990-04-25 | Hitachi Ltd | Substrate for optical disk and optical disk formed by using the substrate |
| JPH02310834A (en) * | 1989-05-24 | 1990-12-26 | Nec Corp | Optical recording medium |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4998934A (en) * | 1989-08-21 | 1991-03-12 | Gerald Bernstein | Needle adaptor for an electrosurgical tool |
| CA2121398C (en) * | 1994-04-15 | 2007-04-24 | Ahmad Amiri | Method and apparatus for implanting synthetic hair |
| US5611811A (en) * | 1994-04-29 | 1997-03-18 | Star-Wood, Inc. | Micro and mini hair transplant device |
| AU4990596A (en) * | 1995-02-22 | 1996-09-11 | Jacques Michael Casparian | Dilator/hair implanter device |
| US5868758A (en) * | 1995-02-28 | 1999-02-09 | Markman; Barry S. | Method apparatus and kit for performing hair grafts |
| US5951572A (en) * | 1995-02-28 | 1999-09-14 | Markman; Barry S. | Method, apparatus and kit for performing hair grafts |
| US5797945A (en) * | 1997-02-24 | 1998-08-25 | Saifi; Marwan | Hemostatic dilator |
| FR2776180B1 (en) * | 1998-03-17 | 2000-08-11 | Pascal Boudjema | DEVICE FOR IMPLANTING SMALL DIAMETER HAIR GRAFTS |
| KR20010016756A (en) * | 1999-08-03 | 2001-03-05 | 박희진 | Artificial hair grafting device |
| US6585746B2 (en) | 2000-04-20 | 2003-07-01 | Philip L. Gildenberg | Hair transplantation method and apparatus |
| US7493168B2 (en) * | 2002-02-01 | 2009-02-17 | The Cleveland Clinic Foundation | Electrical stimulation to treat hair loss |
| US6834206B1 (en) * | 2003-12-23 | 2004-12-21 | Sono-Therapy Institute, Inc. | Method for the electrical stimulation of human tissue to encourage hair growth |
| US10299871B2 (en) | 2005-09-30 | 2019-05-28 | Restoration Robotics, Inc. | Automated system and method for hair removal |
| US7962192B2 (en) | 2005-09-30 | 2011-06-14 | Restoration Robotics, Inc. | Systems and methods for aligning a tool with a desired location or object |
| US20070078466A1 (en) * | 2005-09-30 | 2007-04-05 | Restoration Robotics, Inc. | Methods for harvesting follicular units using an automated system |
| KR101623231B1 (en) | 2009-11-27 | 2016-05-20 | 헤어스테틱스 엘티디. | Hair implant anchors and systems and methods for use thereof |
| US20160213400A1 (en) * | 2011-07-28 | 2016-07-28 | Kun Oc | Hair transplanter |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1059631A (en) * | 1909-12-04 | 1913-04-22 | Aurel Popovics | Method of embedding artificial hair. |
| US3062214A (en) * | 1959-07-13 | 1962-11-06 | Hairagain Inc | Method of implanting fibers in the scalp |
| US3998230A (en) * | 1974-10-22 | 1976-12-21 | Hairegenics, Inc. | Hair transplant process |
| GB1553950A (en) * | 1977-06-28 | 1979-10-17 | Hairegenics Int Inc | Method and apparatus for implanting hair |
| US4224944A (en) * | 1978-08-21 | 1980-09-30 | Roberts Wallace A | Epilation apparatus |
| US4221212A (en) * | 1979-03-26 | 1980-09-09 | Hairegenics, Inc. | Method of implanting hair |
| US4321926A (en) * | 1979-04-16 | 1982-03-30 | Roge Ralph R | Insertion detecting probe and electrolysis system |
| JPS569410A (en) * | 1979-07-03 | 1981-01-30 | Shirou Yamada | Hair planting instrument |
| US4550728A (en) * | 1982-08-23 | 1985-11-05 | L. P. Systems Corporation | Epilator |
-
1986
- 1986-05-28 JP JP61121114A patent/JPS62279532A/en active Pending
-
1987
- 1987-05-13 US US07/049,582 patent/US4751927A/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113452A (en) * | 1988-10-21 | 1990-04-25 | Hitachi Ltd | Substrate for optical disk and optical disk formed by using the substrate |
| JPH02310834A (en) * | 1989-05-24 | 1990-12-26 | Nec Corp | Optical recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| US4751927A (en) | 1988-06-21 |
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